Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7fb0dd9f3ae955b8f4d803d837574ba04eb74eba47ac3f10adce9889236e9de3' 
  AND token = 'mhW4z6e2E+N/RwrxHJm754+tY+U5nmUbQgJpj9xzccs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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