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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1e575f0586c0e9fe0f81d1278acb334372cafb809d267eae53f6ada4f62bd46e' 
  AND token = 'cdg6Ix6VXzqv3i6TdC00vhmEGyu2stdSew0xX2CJUTo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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