Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c89a3d14edbcecbef2cfcc157d99b45fb553ca63d27ac9de0d30f58fbf2e2f98' 
  AND token = '6ju9pLWLG+XejNqN0300gHy/ikoZ40xGfQVEmSXeieE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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