Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e52527de1a9571553f2a4f1591ebf9bb82ed6776e298aa849629730b93d4c151' 
  AND token = '+kR1PJwOU1o9rwyYZ3QJC14UREhQPAiudVKApg5AnFg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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