Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ea6e0b09690471099e146e201060e1159412eac310bb3ed7e4c88e7799dd1a6f' 
  AND token = '+gn9/JdVDToebjuTU1soM9Ouxi1zuXBCuWOVSXA+4rU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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