Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1ac08036ff5e5e2906d409622fac0b046a2862f7b6dd929b37a528e6d45c3dde' 
  AND token = 'dpa9K6K2AHygzTujzIlzeaecV0lONQoyXYgKK+uUUG0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}