Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed8f2a3474c430c09fbd875e674e7abd933aae97c61ac25ab6dee1c2d41ea61c' 
  AND token = 'BSfP1V9Ki/fbZWJ44Snf+usPJitBdsCe18CAaRhy0q4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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