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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '10e4f8fc8659afe073d10ba77c4e51d7808fc0425dcf2651bd9d5786919a1cae' 
  AND token = 'C1gLX39MhLjcLScOSyqJxetQLsITYaX6h1wmqn0CRjE=' 
  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"
    }
  }
}