Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '98d29000cc9ac82be2f230b86b9d61d3b5332b6fa3184b429d62df4fb3876a2c' 
  AND token = 'xKN505El4j2MnXcVDmUhRZ9cJZjOvfYR7yTJ7B5v0V0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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