Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '16f7d2326e633847af846eaefa2b47e497f7336e4188637481079b12ea5e882f' 
  AND token = 'SUg02zXMb5/MQAclp0S66R8b0k7HqvPBp+7P4VVT0KI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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