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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'db6899d9f7ae531001c968ca49d84bd35eb5122add69360746c84d0d07d3156c' 
  AND token = 'Uy19AxYOIuWrOWtYBR71+ZNj4Ulog4k1b7asV91ea3A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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