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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1011c798f2f57a0e64996e47a1d9480580f5eae9026859697bca18c48d82f691' 
  AND token = 'qiD/qFUJ9AN+J4EripqLfds5/JpOfCJo0dXjM8Go4Qo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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