Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8a8a4862bcaad321d404069d6f868d5efd223c523da1a107c9e4d5673cfadb28' 
  AND token = '0Egk1sf9gUkRL2u63KEb3pakCg2CN21IuzV2PM2EDRs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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