Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f545b43cb48335955fff158b1c025dc9f7f0450c16a83f1f9a0a982444769804' 
  AND token = '9zUYFduvuia12kZLzxXlWUQppSPO4SOy18q0PSHpmjY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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