Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '14d17910ddc57410ed2af768c20b5157f5f34a7797767b53eff9d9797cc1ae2e' 
  AND token = '49TheZAQAOafp6StMg4KjACrGX8xXVgKoJAWogV5i+g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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