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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '633f3866d76624287d303345473a73b472bef242ae473037db73aceb93fab62f' 
  AND token = 'J4FK4hdHxv7Bwlln0V9IW+3Kw4sEqO9FYBntcVwgAYY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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