Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e19b25de9e4502fc477ab75664bf3091845c65caeb3d84d68e15fe89c8976926' 
  AND token = 'PbHDci2LcEm0F0GEjP5wbQrOPH+nCm83e0cfxYC+/Gs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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