Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ff75e6d59ce20255424135363ca8a23bb4aadda0d962755dec1baa5b4b2d3618' 
  AND token = 'LeNcyc3RfL3MEJBDkb5kjPZl7dqbLiAee8NLuEmmWZc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00099

JSON explain

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