Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6bc93d9a57065caccdf817e5bb7e9fa9b1a358d123bc97e01b9abd2b4d6e75bb' 
  AND token = 'aiE9F2FRsnYLPLV5trUrjvwubGGuWTQaPo2EidctbAc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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