Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '952f8a333ef884d4f8c95a34ccf9abf409b8d45500a606f71217ed352b956c3b' 
  AND token = 'Hb5ayeIjBxyzZdWmz2IR5xrU4hTSbfCThiP5waSq41g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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