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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f0dda0976547d01aef9fd6b4e201f9117a868f9e80a96903ff44bd05b8574aa' 
  AND token = 'P9YV0+xgV4rZTQyEEyER5Ho3Vojgf95NuHddZneiCs8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}