Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'afa0380c39c79ee0c50ef8739eac3149bc61a058070a2ed2c4e3aa8c66c52e43' 
  AND token = 'fOMcpRL7y9IYG3r0bdZGfKYcxsaqAwa0xH9BC+Fp2wc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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