Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b77156b170a91ee34a0e6eb583a1276f8cb72696e5f4ba95ec599c04e527e598' 
  AND token = '38lMyxXT0XvKdCNeTqQ23msaw9u7UneCHKEUlE2veeo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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