Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e6ab8a52f8ca8a2f757fef53aa4697f1a3883b6cf2e9342d68cb6aa3ba3e85d' 
  AND token = '9IA/rkkUp2MIgS/cnUsA8cpQlDt+HA0kTU25tl3R5AU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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