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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd25f0daf6d801130792d56e7ad4ad17deca2430259226c5ddf25469d9766719c' 
  AND token = 'zIK8HC4E5Fx36Go2TFrL5SI6kOq1wD7mtggvDurmhvQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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