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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f3a33a90ff4d1b385002a8e9f092b3bde26cc0b26777bca8001cdbaa1bbad6d7' 
  AND token = 'MlzBny/AbREWBaU6/mF2I5hBK6l4lowNXuR/sAvpUgs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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