Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3f5d230222f98d80fa4670f2b49a2ebd8e8271a51f49e612e6f966e5dc41a414' 
  AND token = 'Vzoa1vLged7L0ZgDJvCTALMiTW05gASkll2lVYj8S2U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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