Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '091b4391673af3ab56c2abab6d0ba728b5845da1295c014334d52925da71a982' 
  AND token = '2CgQLTPDUInncG56XYMYQiSFpwY6Lm51GGonxQeNYQ0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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