Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e2ff3a32ac7a252b44057f8cbe0c5a2e63d9f0cad9e4bfe022173be89a8b32d4' 
  AND token = 'CILFplgC274dQvJfjLFo36Fp+sLTrrD9z1ZfuXFizEA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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