Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8bdb42c6ff5d5254fd467083a198593f1b87fed3398f768846453a59a27216d8' 
  AND token = 'xtmT5fnyG6Ez4mJPZXJxUShRjyyQLhkdd2T3cgMLumQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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