Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f8de55f43460b8c097aadac762188aacc2ee102d5b421845d59a2ec068ba7db7' 
  AND token = 'Lh2M/BNuT391McQxAVklPe8xm39/tkpekcIGvhHVmdE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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