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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '10ea1bca109fffabec3b64c7788378a0565fb9467e073dfc642069a96e981f9f' 
  AND token = 'svoi0zYYadFQu+nlPS2fayTszF68f+cw2La/a0D+pLY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}