Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7c450e384cda2e37cb5c6c65876f3bc30de7e09cae9d49ea37aff6b94671343e' 
  AND token = 'Q8m52euQW+SK7qMxcnwrQ8x2erGEjHnsBd9z4VzWGe0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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