Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a1f3547cd357c26f8a197bfb0190cb9a6fee5fc79f90d1ca545e7f8a9112b177' 
  AND token = 'CWzkzNow54vYkAmoKA6U2m1gMw4keyKavV7BXS5AwC4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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