Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e1c1b9628f0660e2fb2d36e6dbad40102557bda9a2be55440b4d247e8d0e1d8a' 
  AND token = 'PeuLVKexl3A5sGvSW2ESXinw3mqjHksoDE/kKtAE+hY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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