Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e8190cc48073d008eaea4f3271707c1dca2d6d89db8313fd7a8b62632a38168e' 
  AND token = '0ezgH/JoFutW9uM81UAAUPOr3VY35CnXta0/c287ndk=' 
  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"
    }
  }
}