Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4eed87378e73cc95dfb85e0775f2856fb6424ea8e9e44587f19e25b74b73fc8d' 
  AND token = 'Htp9PRq9IchlIKvNCZY5eL1XUNrP2LpGdJ6yGtTFa70=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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