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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5a24a81a29cba1526bf20b8afab6dc1344ae11ce0f4a49320279c6c27b7641cd' 
  AND token = '60MihJh4h06POc4jgITV1GTeZbpzxZaInqWaLvFoGQU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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