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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '249a609548ba429a17fcd9eb17895ec22e8b9e010d71ece400bfb31d795ce09f' 
  AND token = 'tJ7KvC663D2aTlIyk5PyDyYJa0+RH7wFE468D7i79DU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00150

JSON explain

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