Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f2961f5c4dfcafdbf1ae5957c4a0cd161c41bda5b6b93ee81e6403bd8508f7af' 
  AND token = 'vi6QRbXoF646VSuK/JgxOt+3z/spSO26EuYnprTjGrI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00115

JSON explain

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