Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6c7d79bbe6a6a217f53d9d882b88c55f51c7e7629d30cddf5459caebf993982a' 
  AND token = 'sim093kuR2PsuEYy4RYd728CohlXbcqsOrqPbIffq8I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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