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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b17479f6ebe27fb3bd7c70a72a7d6f83868eb5ed18e1d9df43436bab1f7137cf' 
  AND token = 'WM0p9qAr4Sz60b42vfkSo62fXeTh23UNwlxAK0PxqQU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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