Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a508de10606d9a5410f867d8999ffee8a5a5466828c9bb42af5e75156fc7d79d' 
  AND token = '7LYchBN+FaE91MEOJGL2RXU9+J2SlKt76F6r0MCQC4g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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