Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cb6b4528abb4016056656f9f79f2a6064094b519dd52c2b659fc0721ac4d3365' 
  AND token = 'i2zj9fF3QM1tc6at7L0ICBavR9hnDx5gUQXoDJOcvmY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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