Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '57a2c305f1b2b229e4ea573c290fcc069d7d3b4d3ad98f911d3a94a0693b51a7' 
  AND token = 'P+Z085zr08XgSwWx3VuQ+MJwxtjvs5AjjrH1QJoTOdM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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