Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2862e62eb20eb5f2dd11fc8684400a372ce6171b0ab83fd23d5139ca61cb98ed' 
  AND token = 'LsFg6s2x+ZsP+EbuPzzU1Zfh6tuUMTl8XO764TA9aPY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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