Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ca70584ef37e1b5f4a92fb435569e313ed7a1f73e0b5dd8f03ffdfdd1321d16e' 
  AND token = 'smId/PuE2vPe6FrB8e/pgmb1R1iT8OOvhvGQ63ZjAuE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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