Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4c29fdd285cad962fa7bc131d58846aa0c0e37e4a7a998569bc113577537ab45' 
  AND token = '2Q/rDeAJnwRi24FCuFDfAsM+0sPfICRW6R5ykR40z4Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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