Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2bcef3359d78a20247fac5a2126ccd13c774cc3933e21576ae0fd4755ac06a7c' 
  AND token = '1z/4jmGL0P3IxyIipU4HzEgsKxzfeCZNmaEVjK0tVL4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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