Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '75dd43b59d356b0bd9fda9d30d8d0f9df15cbca65cacff35bea77ca212ecf909' 
  AND token = '16jAsx7he70yla9BKZdwkyIg91DDncn5KFRTUsVhaC0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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