Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8c3b1f98ce5bb40284ce27a95f6bc8ad66872865be4dd058b7c90873b5b84e39' 
  AND token = 'qPLHU3Snrtmr1ghkPWh/QIJQaxErrMWXGlBGhU9FeEc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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