Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '59446048377981c8e05b805c1697e5bbe49e195ce54248f593bacfc235099e05' 
  AND token = '+Gl5O/xgHtOcI7FIRRHeS195fZVsiF5yY8fvMKi2PCI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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